// This file was generated by gir (https://github.com/gtk-rs/gir)
// from gir-files (https://github.com/gtk-rs/gir-files)
// DO NOT EDIT

use crate::EventController;
use crate::Gesture;
use crate::GestureDrag;
use crate::GestureSingle;
use crate::Orientation;
use crate::PanDirection;
use crate::PropagationPhase;
use crate::Widget;
use glib::object::Cast;
use glib::object::IsA;
use glib::object::ObjectType as ObjectType_;
use glib::signal::connect_raw;
use glib::signal::SignalHandlerId;
use glib::translate::*;
use glib::StaticType;
use glib::ToValue;
use std::boxed::Box as Box_;
use std::fmt;
use std::mem::transmute;

glib::wrapper! {
    /// [`GesturePan`][crate::GesturePan] is a [`Gesture`][crate::Gesture] implementation able to recognize
    /// pan gestures, those are drags that are locked to happen along one
    /// axis. The axis that a [`GesturePan`][crate::GesturePan] handles is defined at
    /// construct time, and can be changed through
    /// [`set_orientation()`][Self::set_orientation()].
    ///
    /// When the gesture starts to be recognized, [`GesturePan`][crate::GesturePan] will
    /// attempt to determine as early as possible whether the sequence
    /// is moving in the expected direction, and denying the sequence if
    /// this does not happen.
    ///
    /// Once a panning gesture along the expected axis is recognized,
    /// the `signal::GesturePan::pan` signal will be emitted as input events
    /// are received, containing the offset in the given axis.
    ///
    /// # Implements
    ///
    /// [`GestureDragExt`][trait@crate::prelude::GestureDragExt], [`GestureSingleExt`][trait@crate::prelude::GestureSingleExt], [`GestureExt`][trait@crate::prelude::GestureExt], [`EventControllerExt`][trait@crate::prelude::EventControllerExt], [`trait@glib::ObjectExt`]
    #[doc(alias = "GtkGesturePan")]
    pub struct GesturePan(Object<ffi::GtkGesturePan, ffi::GtkGesturePanClass>) @extends GestureDrag, GestureSingle, Gesture, EventController;

    match fn {
        type_ => || ffi::gtk_gesture_pan_get_type(),
    }
}

impl GesturePan {
    /// Returns a newly created [`Gesture`][crate::Gesture] that recognizes pan gestures.
    /// ## `widget`
    /// a [`Widget`][crate::Widget]
    /// ## `orientation`
    /// expected orientation
    ///
    /// # Returns
    ///
    /// a newly created [`GesturePan`][crate::GesturePan]
    #[doc(alias = "gtk_gesture_pan_new")]
    pub fn new<P: IsA<Widget>>(widget: &P, orientation: Orientation) -> GesturePan {
        skip_assert_initialized!();
        unsafe {
            Gesture::from_glib_full(ffi::gtk_gesture_pan_new(
                widget.as_ref().to_glib_none().0,
                orientation.into_glib(),
            ))
            .unsafe_cast()
        }
    }

    // rustdoc-stripper-ignore-next
    /// Creates a new builder-pattern struct instance to construct [`GesturePan`] objects.
    ///
    /// This method returns an instance of [`GesturePanBuilder`] which can be used to create [`GesturePan`] objects.
    pub fn builder() -> GesturePanBuilder {
        GesturePanBuilder::default()
    }

    /// Returns the orientation of the pan gestures that this `self` expects.
    ///
    /// # Returns
    ///
    /// the expected orientation for pan gestures
    #[doc(alias = "gtk_gesture_pan_get_orientation")]
    #[doc(alias = "get_orientation")]
    pub fn orientation(&self) -> Orientation {
        unsafe { from_glib(ffi::gtk_gesture_pan_get_orientation(self.to_glib_none().0)) }
    }

    /// Sets the orientation to be expected on pan gestures.
    /// ## `orientation`
    /// expected orientation
    #[doc(alias = "gtk_gesture_pan_set_orientation")]
    pub fn set_orientation(&self, orientation: Orientation) {
        unsafe {
            ffi::gtk_gesture_pan_set_orientation(self.to_glib_none().0, orientation.into_glib());
        }
    }

    /// This signal is emitted once a panning gesture along the
    /// expected axis is detected.
    /// ## `direction`
    /// current direction of the pan gesture
    /// ## `offset`
    /// Offset along the gesture orientation
    #[doc(alias = "pan")]
    pub fn connect_pan<F: Fn(&Self, PanDirection, f64) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn pan_trampoline<F: Fn(&GesturePan, PanDirection, f64) + 'static>(
            this: *mut ffi::GtkGesturePan,
            direction: ffi::GtkPanDirection,
            offset: libc::c_double,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this), from_glib(direction), offset)
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"pan\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    pan_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }

    #[doc(alias = "orientation")]
    pub fn connect_orientation_notify<F: Fn(&Self) + 'static>(&self, f: F) -> SignalHandlerId {
        unsafe extern "C" fn notify_orientation_trampoline<F: Fn(&GesturePan) + 'static>(
            this: *mut ffi::GtkGesturePan,
            _param_spec: glib::ffi::gpointer,
            f: glib::ffi::gpointer,
        ) {
            let f: &F = &*(f as *const F);
            f(&from_glib_borrow(this))
        }
        unsafe {
            let f: Box_<F> = Box_::new(f);
            connect_raw(
                self.as_ptr() as *mut _,
                b"notify::orientation\0".as_ptr() as *const _,
                Some(transmute::<_, unsafe extern "C" fn()>(
                    notify_orientation_trampoline::<F> as *const (),
                )),
                Box_::into_raw(f),
            )
        }
    }
}

#[derive(Clone, Default)]
// rustdoc-stripper-ignore-next
/// A [builder-pattern] type to construct [`GesturePan`] objects.
///
/// [builder-pattern]: https://doc.rust-lang.org/1.0.0/style/ownership/builders.html
pub struct GesturePanBuilder {
    orientation: Option<Orientation>,
    button: Option<u32>,
    exclusive: Option<bool>,
    touch_only: Option<bool>,
    n_points: Option<u32>,
    window: Option<gdk::Window>,
    propagation_phase: Option<PropagationPhase>,
    widget: Option<Widget>,
}

impl GesturePanBuilder {
    // rustdoc-stripper-ignore-next
    /// Create a new [`GesturePanBuilder`].
    pub fn new() -> Self {
        Self::default()
    }

    // rustdoc-stripper-ignore-next
    /// Build the [`GesturePan`].
    pub fn build(self) -> GesturePan {
        let mut properties: Vec<(&str, &dyn ToValue)> = vec![];
        if let Some(ref orientation) = self.orientation {
            properties.push(("orientation", orientation));
        }
        if let Some(ref button) = self.button {
            properties.push(("button", button));
        }
        if let Some(ref exclusive) = self.exclusive {
            properties.push(("exclusive", exclusive));
        }
        if let Some(ref touch_only) = self.touch_only {
            properties.push(("touch-only", touch_only));
        }
        if let Some(ref n_points) = self.n_points {
            properties.push(("n-points", n_points));
        }
        if let Some(ref window) = self.window {
            properties.push(("window", window));
        }
        if let Some(ref propagation_phase) = self.propagation_phase {
            properties.push(("propagation-phase", propagation_phase));
        }
        if let Some(ref widget) = self.widget {
            properties.push(("widget", widget));
        }
        glib::Object::new::<GesturePan>(&properties)
            .expect("Failed to create an instance of GesturePan")
    }

    /// The expected orientation of pan gestures.
    pub fn orientation(mut self, orientation: Orientation) -> Self {
        self.orientation = Some(orientation);
        self
    }

    /// Mouse button number to listen to, or 0 to listen for any button.
    pub fn button(mut self, button: u32) -> Self {
        self.button = Some(button);
        self
    }

    /// Whether the gesture is exclusive. Exclusive gestures only listen to pointer
    /// and pointer emulated events.
    pub fn exclusive(mut self, exclusive: bool) -> Self {
        self.exclusive = Some(exclusive);
        self
    }

    /// Whether the gesture handles only touch events.
    pub fn touch_only(mut self, touch_only: bool) -> Self {
        self.touch_only = Some(touch_only);
        self
    }

    /// The number of touch points that trigger recognition on this gesture,
    pub fn n_points(mut self, n_points: u32) -> Self {
        self.n_points = Some(n_points);
        self
    }

    /// If non-[`None`], the gesture will only listen for events that happen on
    /// this [`gdk::Window`][crate::gdk::Window], or a child of it.
    pub fn window(mut self, window: &gdk::Window) -> Self {
        self.window = Some(window.clone());
        self
    }

    /// The propagation phase at which this controller will handle events.
    pub fn propagation_phase(mut self, propagation_phase: PropagationPhase) -> Self {
        self.propagation_phase = Some(propagation_phase);
        self
    }

    /// The widget receiving the `GdkEvents` that the controller will handle.
    pub fn widget<P: IsA<Widget>>(mut self, widget: &P) -> Self {
        self.widget = Some(widget.clone().upcast());
        self
    }
}

impl fmt::Display for GesturePan {
    fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
        f.write_str("GesturePan")
    }
}